/* PDCurses */

#include "pdcsdl.h"

#include <string.h>

static SDL_Event event;
static SDLKey oldkey;
static MOUSE_STATUS old_mouse_status;

static struct
{
    SDLKey keycode;
    bool numkeypad;
    unsigned short normal;
    unsigned short shifted;
    unsigned short control;
    unsigned short alt;
} key_table[] =
{
    /* keycode	keypad	normal	     shifted	   control	alt*/
    {SDLK_LEFT,	FALSE,	KEY_LEFT,    KEY_SLEFT,    CTL_LEFT,	ALT_LEFT},
    {SDLK_RIGHT,	FALSE,	KEY_RIGHT,   KEY_SRIGHT,   CTL_RIGHT,	ALT_RIGHT},
    {SDLK_UP,	FALSE,	KEY_UP,      KEY_SUP,	   CTL_UP,	ALT_UP},
    {SDLK_DOWN,	FALSE,	KEY_DOWN,    KEY_SDOWN,    CTL_DOWN,	ALT_DOWN},
    {SDLK_HOME,	FALSE,	KEY_HOME,    KEY_SHOME,    CTL_HOME,	ALT_HOME},
    {SDLK_END,	FALSE,	KEY_END,     KEY_SEND,	   CTL_END,	ALT_END},
    {SDLK_PAGEUP,	FALSE,	KEY_PPAGE,   KEY_SPREVIOUS,CTL_PGUP,	ALT_PGUP},
    {SDLK_PAGEDOWN,FALSE,	KEY_NPAGE,   KEY_SNEXT,    CTL_PGDN,	ALT_PGDN},
    {SDLK_INSERT,	FALSE,	KEY_IC,      KEY_SIC,	   CTL_INS,	ALT_INS},
    {SDLK_DELETE,	FALSE,	KEY_DC,      KEY_SDC,	   CTL_DEL,	ALT_DEL},
    {SDLK_F1,	FALSE,	KEY_F(1),    KEY_F(13),    KEY_F(25),	KEY_F(37)},
    {SDLK_F2,	FALSE,	KEY_F(2),    KEY_F(14),    KEY_F(26),	KEY_F(38)},
    {SDLK_F3,	FALSE,	KEY_F(3),    KEY_F(15),    KEY_F(27),	KEY_F(39)},
    {SDLK_F4,	FALSE,	KEY_F(4),    KEY_F(16),    KEY_F(28),	KEY_F(40)},
    {SDLK_F5,	FALSE,	KEY_F(5),    KEY_F(17),    KEY_F(29),	KEY_F(41)},
    {SDLK_F6,	FALSE,	KEY_F(6),    KEY_F(18),    KEY_F(30),	KEY_F(42)},
    {SDLK_F7,	FALSE,	KEY_F(7),    KEY_F(19),    KEY_F(31),	KEY_F(43)},
    {SDLK_F8,	FALSE,	KEY_F(8),    KEY_F(20),    KEY_F(32),	KEY_F(44)},
    {SDLK_F9,	FALSE,	KEY_F(9),    KEY_F(21),    KEY_F(33),	KEY_F(45)},
    {SDLK_F10,	FALSE,	KEY_F(10),   KEY_F(22),    KEY_F(34),	KEY_F(46)},
    {SDLK_F11,	FALSE,	KEY_F(11),   KEY_F(23),    KEY_F(35),	KEY_F(47)},
    {SDLK_F12,	FALSE,	KEY_F(12),   KEY_F(24),    KEY_F(36),	KEY_F(48)},
    {SDLK_F13,	FALSE,	KEY_F(13),   KEY_F(25),    KEY_F(37),	KEY_F(49)},
    {SDLK_F14,	FALSE,	KEY_F(14),   KEY_F(26),    KEY_F(38),	KEY_F(50)},
    {SDLK_F15,	FALSE,	KEY_F(15),   KEY_F(27),    KEY_F(39),	KEY_F(51)},
    {SDLK_BACKSPACE,FALSE,	0x08,        0x08,	   CTL_BKSP,	ALT_BKSP},
    {SDLK_TAB,	FALSE,	0x09,        KEY_BTAB,	   CTL_TAB,	ALT_TAB},
    {SDLK_PRINT,	FALSE,	KEY_PRINT,   KEY_SPRINT,   KEY_PRINT,	KEY_PRINT},
    {SDLK_PAUSE,	FALSE,	KEY_SUSPEND, KEY_SSUSPEND, KEY_SUSPEND, KEY_SUSPEND},
    {SDLK_CLEAR,	FALSE,	KEY_CLEAR,   KEY_CLEAR,    KEY_CLEAR,	KEY_CLEAR},
    {SDLK_BREAK,	FALSE,	KEY_BREAK,   KEY_BREAK,    KEY_BREAK,	KEY_BREAK},
    {SDLK_HELP,	FALSE,	KEY_HELP,    KEY_SHELP,    KEY_LHELP,	KEY_HELP},
    {SDLK_MENU,	FALSE,	KEY_OPTIONS, KEY_SOPTIONS, KEY_OPTIONS, KEY_OPTIONS},
    {SDLK_ESCAPE,	FALSE,	0x1B,        0x1B,	   0x1B,	ALT_ESC},
    {SDLK_KP_ENTER,TRUE,	PADENTER,    PADENTER,	   CTL_PADENTER,ALT_PADENTER},
    {SDLK_KP_PLUS,	TRUE,	PADPLUS,     '+',	   CTL_PADPLUS, ALT_PADPLUS},
    {SDLK_KP_MINUS,TRUE,	PADMINUS,    '-',	   CTL_PADMINUS,ALT_PADMINUS},
    {SDLK_KP_MULTIPLY,TRUE,PADSTAR,     '*',	   CTL_PADSTAR, ALT_PADSTAR},
    {SDLK_KP_DIVIDE,TRUE,	PADSLASH,    '/',	   CTL_PADSLASH,ALT_PADSLASH},
    {SDLK_KP_PERIOD,TRUE,	PADSTOP,     '.',	   CTL_PADSTOP, ALT_PADSTOP},
    {SDLK_KP0,	TRUE,	PAD0,	     '0',	   CTL_PAD0,	ALT_PAD0},
    {SDLK_KP1,	TRUE,	KEY_C1,      '1',	   CTL_PAD1,	ALT_PAD1},
    {SDLK_KP2,	TRUE,	KEY_C2,      '2',	   CTL_PAD2,	ALT_PAD2},
    {SDLK_KP3,	TRUE,	KEY_C3,      '3',	   CTL_PAD3,	ALT_PAD3},
    {SDLK_KP4,	TRUE,	KEY_B1,      '4',	   CTL_PAD4,	ALT_PAD4},
    {SDLK_KP5,	TRUE,	KEY_B2,      '5',	   CTL_PAD5,	ALT_PAD5},
    {SDLK_KP6,	TRUE,	KEY_B3,      '6',	   CTL_PAD6,	ALT_PAD6},
    {SDLK_KP7,	TRUE,	KEY_A1,      '7',	   CTL_PAD7,	ALT_PAD7},
    {SDLK_KP8,	TRUE,	KEY_A2,      '8',	   CTL_PAD8,	ALT_PAD8},
    {SDLK_KP9,	TRUE,	KEY_A3,      '9',	   CTL_PAD9,	ALT_PAD9},
    {0,		0,	0,	     0,		   0,		0}
};

void PDC_set_keyboard_binary(bool on)
{
    PDC_LOG(("PDC_set_keyboard_binary() - called\n"));
}

/* check if a key or mouse event is waiting */

bool PDC_check_key(void)
{
    int haveevent = SDL_PollEvent(&event);

    return haveevent;
}

static int _process_key_event(void)
{
    int i, key = 0;

    SP->key_modifiers = 0L;
    SP->key_code = FALSE;

    if (event.type == SDL_KEYUP)
    {
        if (SP->return_key_modifiers && event.key.keysym.sym == oldkey)
        {
            SP->key_code = TRUE;

            switch (oldkey)
            {
            case SDLK_RSHIFT:
                return KEY_SHIFT_R;
            case SDLK_LSHIFT:
                return KEY_SHIFT_L;
            case SDLK_RCTRL:
                return KEY_CONTROL_R;
            case SDLK_LCTRL:
                return KEY_CONTROL_L;
            case SDLK_RALT:
                return KEY_ALT_R;
            case SDLK_LALT:
                return KEY_ALT_L;
            default:
                break;
            }

            SP->key_code = FALSE;
        }

        return -1;
    }

    oldkey = event.key.keysym.sym;

    if (event.key.keysym.mod & KMOD_NUM)
        SP->key_modifiers |= PDC_KEY_MODIFIER_NUMLOCK;

    if (event.key.keysym.mod & KMOD_SHIFT)
        SP->key_modifiers |= PDC_KEY_MODIFIER_SHIFT;

    if (event.key.keysym.mod & KMOD_CTRL)
        SP->key_modifiers |= PDC_KEY_MODIFIER_CONTROL;

    if (event.key.keysym.mod & KMOD_ALT)
        SP->key_modifiers |= PDC_KEY_MODIFIER_ALT;

    for (i = 0; key_table[i].keycode; i++)
    {
        if (key_table[i].keycode == event.key.keysym.sym)
        {
            if ((event.key.keysym.mod & KMOD_SHIFT) ||
                    (key_table[i].numkeypad && (event.key.keysym.mod & KMOD_NUM)))
            {
                key = key_table[i].shifted;
            }
            else if (event.key.keysym.mod & KMOD_CTRL)
            {
                key = key_table[i].control;
            }
            else if (event.key.keysym.mod & KMOD_ALT)
            {
                key = key_table[i].alt;
            }

            /* To get here, we ignore all other modifiers */

            else
                key = key_table[i].normal;

            SP->key_code = (key > 0x100);
            break;
        }
    }

    if (!key)
    {
        key = event.key.keysym.unicode;

        if (key > 0x7f)
            key = 0;
    }

    /* Handle ALT letters and numbers */

    if (event.key.keysym.mod & KMOD_ALT)
    {
        if (key >= 'A' && key <= 'Z')
        {
            key += ALT_A - 'A';
            SP->key_code = TRUE;
        }

        if (key >= 'a' && key <= 'z')
        {
            key += ALT_A - 'a';
            SP->key_code = TRUE;
        }

        if (key >= '0' && key <= '9')
        {
            key += ALT_0 - '0';
            SP->key_code = TRUE;
        }
    }

    return key ? key : -1;
}

static int _process_mouse_event(void)
{
    SDLMod keymods;
    short shift_flags = 0;

    memset(&SP->mouse_status, 0, sizeof(MOUSE_STATUS));

    keymods = SDL_GetModState();

    if (keymods & KMOD_SHIFT)
        shift_flags |= BUTTON_SHIFT;

    if (keymods & KMOD_CTRL)
        shift_flags |= BUTTON_CONTROL;

    if (keymods & KMOD_ALT)
        shift_flags |= BUTTON_ALT;

    if (event.type == SDL_MOUSEMOTION)
    {
        int i;

        SP->mouse_status.x = (event.motion.x - pdc_xoffset) / pdc_fwidth;
        SP->mouse_status.y = (event.motion.y - pdc_yoffset) / pdc_fheight;

        if (!event.motion.state ||
                (SP->mouse_status.x == old_mouse_status.x &&
                 SP->mouse_status.y == old_mouse_status.y))
            return -1;

        SP->mouse_status.changes = PDC_MOUSE_MOVED;

        for (i = 0; i < 3; i++)
        {
            if (event.motion.state & SDL_BUTTON(i + 1))
            {
                SP->mouse_status.button[i] = BUTTON_MOVED | shift_flags;
                SP->mouse_status.changes |= (1 << i);
            }
        }
    }
    else
    {
        short action = (event.button.state == SDL_PRESSED) ?
                       BUTTON_PRESSED : BUTTON_RELEASED;
        Uint8 btn = event.button.button;

        SP->mouse_status.x = (event.button.x - pdc_xoffset) / pdc_fwidth;
        SP->mouse_status.y = (event.button.y - pdc_yoffset) / pdc_fheight;

        /* handle scroll wheel */

        if ((btn >= 4 && btn <= 7) && action == BUTTON_RELEASED)
        {
            switch (btn)
            {
            case 4:
                SP->mouse_status.changes = PDC_MOUSE_WHEEL_UP;
                break;
            case 5:
                SP->mouse_status.changes = PDC_MOUSE_WHEEL_DOWN;
                break;
            case 6:
                SP->mouse_status.changes = PDC_MOUSE_WHEEL_LEFT;
                break;
            case 7:
                SP->mouse_status.changes = PDC_MOUSE_WHEEL_RIGHT;
            }

            SP->key_code = TRUE;
            return KEY_MOUSE;
        }

        if (btn < 1 || btn > 3)
            return -1;

        /* check for a click -- a press followed immediately by a release */

        if (action == BUTTON_PRESSED && SP->mouse_wait)
        {
            SDL_Event rel;

            napms(SP->mouse_wait);

            if (SDL_PollEvent(&rel))
            {
                if (rel.type == SDL_MOUSEBUTTONUP && rel.button.button == btn)
                    action = BUTTON_CLICKED;
                else
                    SDL_PushEvent(&rel);
            }
        }

        btn--;

        SP->mouse_status.button[btn] = action | shift_flags;
        SP->mouse_status.changes = (1 << btn);
    }

    old_mouse_status = SP->mouse_status;

    SP->key_code = TRUE;
    return KEY_MOUSE;
}

/* return the next available key or mouse event */

int PDC_get_key(void)
{
    switch (event.type)
    {
    case SDL_QUIT:
        exit(1);
    case SDL_VIDEORESIZE:
        if (pdc_own_screen &&
                (event.resize.h / pdc_fheight != LINES ||
                 event.resize.w / pdc_fwidth != COLS))
        {
            pdc_sheight = event.resize.h;
            pdc_swidth = event.resize.w;

            if (!SP->resized)
            {
                SP->resized = TRUE;
                SP->key_code = TRUE;
                return KEY_RESIZE;
            }
        }
        break;
    case SDL_MOUSEMOTION:
        SDL_ShowCursor(SDL_ENABLE);
    case SDL_MOUSEBUTTONUP:
    case SDL_MOUSEBUTTONDOWN:
        oldkey = SDLK_SPACE;
        return _process_mouse_event();
    case SDL_KEYUP:
    case SDL_KEYDOWN:
        PDC_mouse_set();
        return _process_key_event();
    case SDL_USEREVENT:
        PDC_blink_text();
    }

    return -1;
}

/* discard any pending keyboard or mouse input -- this is the core
   routine for flushinp() */

void PDC_flushinp(void)
{
    PDC_LOG(("PDC_flushinp() - called\n"));

    while (PDC_check_key());
}

bool PDC_has_mouse(void)
{
    return TRUE;
}

int PDC_mouse_set(void)
{
    SDL_ShowCursor(SP->_trap_mbe ? SDL_ENABLE : SDL_DISABLE);

    return OK;
}

int PDC_modifiers_set(void)
{
    return OK;
}
